Question

A number is divisible by both $5$ and $12$. By which other number will that number be always divisible?

Answer 1

We know that, if a number is divisible by $a$ and $b$ then the LCM of $a,b$ will be always divisible.

Now, the given numbers are $5$ and $12$.

LCM of $5,12$ is $5\times 12=60$
Hence, the number must be divisible by $60$.